Water-tube boiler.



1. E. BELL.

WATER TUBE BOILER.

APPLICATION FILED JAN-24,191?- 3 SHEETS-SHEET 1 WITNIII' INVENTOR J. E. BELL.

WATER TUBE BOILER.

APPLICATION FILED JAN-24] I917.

1 ,2'7 5, 3 6 6 Patented Aug. 13, 1918.

3 SHEETSSHEET 2- xmam 1. E. BELL. WATER TUBE BOILER.

APPLICATION FILED JAN.24, 19H.

,Q'? 5, 3 6 6 Patented Aug. 13, 1918.

3 SHEETS-SHEET 3.

' QITBJESSEF- INVENTOR the gases are caused to UNITED s'rarns arana onruon.

/ JOHN E. BELL, 0F YORK, N. Y.

waranrtru a'n BOILER.

Original applicationsfiled June 23, 1 91 5 e i a1 No. 35,788, and July 21, 1915, Serial No. 41,089. Divided and this application filed January 24, 1917. Serial No. 144,188.

To all whom t may concern:

Be it known that 1, JOHN E. BELL, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented a new and useful Improvement in Water-Tube Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which:

Figure 1 is a Sectional side elevation showing one form of boiler construction ernbodying one form of my invention.

the arrangement of one of the blowers in the bafiiing in back of the banks of tubes.

Figs. 3 and 4 are detail views showing different forms of eXpansible connections for the blower; and 4 Fig. 5 is a view similar to Fig. 1 showing another form of boiler with my improved blower in connection therewith.

My invention relates to water tube boilers, particularly those of the vertical type, wherein transverse upper and lower drums are connected by banks of tubes over which pass in series by bafiiing devices.

The object of my invention is to provide a new and improved, form f blower or blowers associated with the ,Jbaflling in such a manner as to readily clean the various passes.

This application forms a division of my applications Serial No. 35,788, filed June 23, 1915, and Serial No]. 41,089, filed July 21, 1915.

Figs. 1, 2, 3 and of this case, together with the description thereof, are the same as Figs. 10, 12, 14 and 15 in my application, Serial No. 8;"),(88 jwhile Fig. 5,together with the description thereof, is the same as Fig. 1 in my application, Serial No. 41,089.

The precise nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that changes may be made in the details of con struction and the arrangement of the baflles, as well as the arrangement of the blowers,

without departing from the spirit and scope of my invention as defined in the appended claims. y

Referring to the form shown in Figs. 1 and 2, the reference characters 2, 3 and' 4 designate the usual upper transverse steam and water drums of a Stirling type of boiler, and 5 a transverse mud drum. These drums are connected by the threezbanks of tubes 6, 7 and 8, the Water spaces of the drums 3 and 4 being preferably connected by water eirculators 9, and the three upper drums being preferably connected by steam circulatingv Fig. 2 is an enlarged detail view showing,

tubes 10 and 11. The steam is preferably taken ofi from the middle drum 3, as shown by the outlet 12. i

In the form of boiler shown, there is a dog-house furnace 13 having abridgewall 15, and in the front part of the front bank of tubes, I provide a baffie coacting with the upper part of the bridge wall to form a threat or outlet 16 through which the flame and gases are led into the secondary combustion chamber 17. The upper portion 18 of this front baffle preferably lies back of the front row of tubes and may be of the form shown in Fig. 2, consisting of bricks or blocks having openings therethroughfor the purpose hereinafter described. i

With this front battle, I preferably employ bailies 24, 25 and 26 extending along the back of the three banks, the baflie 24 extending up from the mud drum and terminating Specification of Lettere Patent. Patented Aug. 13, 1918.

short of the steam and water drum, and

the gases in this bank as they rise to the uptake 29 or outlet to the stack.

Certain of the blocks or tiles :of the baifles 24, 25 and 26 are provided with transverse openings for the reception of transversely extending pipes 30, each of which is provided with upwardly and downwardly extending nozzlesBl directed in the same direction as the draft, that is, upwardly among the tubes of the front bank, downwardly among the tubes of the second bank and upwardly among the tubes of the third bank. The nozzle pipes are preferably of relatively large diameter drawn down at the ends and pierced with small holes. The pressure is thus brought to the openings and strong jets provided, which gradually flare out and sweep the tubes on all sides, the draft sweeping out the soot and dust thus dislodged. The double jets shown may also assist in the draft.

1 preferably make the cavities in the bricks or tiles larger than the blower pipes and surround the pipes therein with some plastic covering, such as asbestos or hot last cement, to make a neat joint.

Each of these blower pipes extends out through an opening in the side wall and may be connected by a flexible hose and a valve to the steam pipe. The connection through the side wall must be such as to permit the 1 ipe to mo e with the boiler heating surface and still be substantially air tight. Such a connection is shown in Fig. 3 where the steam pipe which is a continuation of the pipe 30, or 'e ured thereto in any desired manner. pipe 32 is secured to the movable plate co ng with the outer plate of a Stdlilllg box 34'; which may be filled with asbesto aching, 35 being the flexible hose r" 4; l have shown a form where inf I box a flexible metal hose lag-8n connecting the plate 3? with s wall of the setting. lower system, I propose to use a. unit i elomn valve in the main steam line. in ti-) blower, the operator will first open the connecting valve to a single pipe then open the quick closing valve 38, leave the steam blast on forpart of a minute, then close the quick closing valve and after that the valve connected to the blower pipe. This will be done in succession with the ditl'erent blower pipes.

in Fig. 5, 2 designates the steam and water drum, and 5 the mud drum, which are connected to other by water tubes bent at upper and lower edges in the usual manner, and. connected to the tube or upset portions of the drums. lhe tubes are shown as divided into four sets hv means of a ii nt battle l0, a middle bafie and a reac 4:2. The front and rear made of special tileand 211 adjacent tubes in the d from the mud drum 1e steam and water rear baffies, in conto a point adja drum. -l "liese horn; and motion-with the tr two down a '3 p p The central ba i]. is -neferab v a subi f t." story brick carried on stant'ial wall o as the lower l-beam sun'oort 43 and e H a 7 asses for the ases.

' a plurality al baffle, form two up heating surface without material obstruction of the flow.

In this construction the front wall l5 is adjacent to the front row of tubes, it bein shown as stepped inwardly from the wall 46 of the combustion chamber 47 to bring it nearer to the tubes. Similarly the rear setting wall l8 is arranged close to the rear row of tubes.

Located within the middle wall or bafie n are a series of blower pipes 30 which are provided with nozzles 31 for blowing soot from the tubes within two of the passes.

The advantages of my invention result from the provision of blowers combined with the bathing to give efiicient blowing operation at any desired time without the insertion of additional devices.

I claim:

l. A boiler setting having a plurality of drums, sets of tubes connectin said drums, a bafile between the sets of to es extending from one wall of the setting to a wall opposite thereto to form serial passes for the gases over the tubes, an outlet to the stack from the last pass, a blower pipe in said, batlle extending approximately the full width thereof, a plurality of jets extending from the blower pipe on opposite sides thereof, said jets being spaced along the length thereof, and extending in the general direction of the path of the gases toassist the draft and blow the soot toward the outlet, substantially as described.

2. A boiler setting having a drums, sets of tubes connectin said drums, a bafile between the sets of tu es extending from one wall of the setting to a wall opposite thereto to form serial passes for the gases, an outlet fromthe last pass leading to the stack, blower pipes in said baflle ex tendin approximately the full width thereof, a p urality of nozzles connected to said blower pipes, the nozzles extending inopposite directions from opposite sides of one of said blower pipes, said nozzles being spaced along the'length of the blower pipes and extendmgin the general direction of the path of the gases to assist the draft and blow the soot toward the outlet, substantially as described.

3. A boiler setting having a plurality of drums, sets of tubes connectmgsaid drums,

of bafiles'between said sets or tubes extending from one wall of the settin to swell opposite thereto to form seria' passes for the gases; an outlet leading from tendinv ahproxiniately the full width therethe draft and blow the soot toward the outof, a plurality of nozzles extending in oppolet, substantially as described. 10 site directions from the blower pipe through In testimony whereof I have hereunto set on of the bafiles, while the nozzles in some my hand. a v o the baflles merely extend in one direction, JOHN E. BELL. said nozzles being spaced along the length Witnesses: of the pipe and extending in the general FERNANDO FALLo, direction of the path of the gases to assist \LINDNER T. SUMMERS. 

